Fiber-reinforced modified-reaction injection-molding nylon sheet and preparation method thereof
A fiber-reinforced, injection-molded technology applied in the field of materials science to achieve the effect of ensuring continuity
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Embodiment 1
[0019] 1) Divide 60 parts of caprolactam into two parts according to 1:1 and add to reactors A and B, vacuumize to 0.1MPa, heat and melt, dehydrate at 120-150°C for 15min, stop vacuuming, and pass nitrogen.
[0020] 2) Open the reactor, add 0.1 part of sodium hydroxide to reactor A, add 0.2 part of 4,4' diphenylmethane-diisocyanate (MDI), 0.2 part of antioxidant, 1.0 part of stabilizer to reactor B, Then the reactors A and B were vacuumed to about 0.1MPa, the reaction temperature was maintained at 140-145°C for 20 minutes, the vacuum was stopped, and nitrogen gas was introduced.
[0021] 3) Cut the glass fiber cloth treated with silane coupling agent into a size that matches the mold cavity of the press, lay it in layers in the mold cavity, and then close the mold and heat it to a temperature of 180°C. The mass fraction of the glass fiber cloth is 40 servings.
[0022] 4) The active materials in the reaction kettles A and B are mixed through the metering device, and immediate...
Embodiment 2
[0024] 1) Divide 80 parts of caprolactam into two parts according to 1:1 and add to reactors A and B, vacuumize to 0.1MPa, heat and melt, dehydrate at 120-150°C for 15min, stop vacuuming, and pass nitrogen.
[0025] 2) Open the reactor, add 0.2 parts of sodium hydroxide to reactor A, add 4 parts of cocatalyst, 0.1 part of antioxidant, and 0.5 parts of stabilizer to reactor B, and then vacuumize reactors A and B to about 0.1MPa , the reaction temperature was maintained at 140-145°C for 10 minutes, the vacuum was stopped, and nitrogen gas was introduced.
[0026] 3) Put 20 parts of chopped glass fibers treated with silane coupling agent into the mold cavity of the press, close the molds, and raise the temperature to 170°C.
[0027] 4) The active materials in the reaction kettles A and B are mixed through the metering device, and immediately injected into the mold cavity at 170°C where the chopped glass fiber is preset, and the mold is closed. After 15 minutes of reaction, pressu...
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